Re: Puncture wound to bell housing!
There is no fluid inside the bellhousing, so don't expect it to leak. You can do whatever you like with it. You can even ignore it, it won't cause a problem.
I've seen this happen when something gets into the bellhousing. It can get caught by the ring gear and thrown hard enough into the housing to make a hole. Does it look like the puncture came from inside?
Former Ford Automatic Transmission Engineer
“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson